Microsoft launched .toolbox, a new site dedicated on learning Silverlight and Expression.
.toolbox features two core learning paths: Design Scenarios and Design Principles. Both begin with teaching basic techniques and build skills and knowledge incrementally. In Design Scenarios, designers and developers learn to create dynamically-rich Silverlight applications using Expression Studio. You will learn to add code-free functionality to designs by following step-by-step tutorials that illustrate how to create interactive user experiences. In Design Principles, you will learn fundamental design concepts (e.g., choosing the right colors and the right fonts) along with tips and techniques in how to apply them to your creations.
One can go for either track and earn leves with that. Each track can be done one by one following a stack or go through the matrix: